Post guard



FIG. 1 is an upper perspective view of a post guard;

FIG. 2 is a top plan view of the post guard of FIG. 1;

FIG. 3 is a bottom plan view of the post guard of FIG. 1; and,

FIG. 4 is a front side elevation view of the post guard of FIG. 1, the rear, right, and left side elevation views being a mirror image thereof.

The broken lines immediately adjacent the shaded areas represent the bounds of the claimed design while other broken lines are directed to environment and are for illustrative purposes only; features illustrated in broken lines form no part of the claimed design. 

The ornamental design for a post guard, as shown and described. 